Is Project Healing Waters available only those vets disabled as a result of active duty or can those vet disabled due to health issues unrelated to their service also join?

It is generally due to active duty injuries. However, we can take any vet who has health or PTSD related injuries. The only thing is you have to be at least 30% disabled by VA standards to participate in national events. But they could still participate in any local event that takes place.